Mold for casting metal pots, &amp;c.



J. POWER. MOLD FOR CASTING METAL POTS, 6w. APPLICATION FILED JULY 19,1909 936,939. Patented Oct. 12,1909.

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J. POWER.

MOLD POR CASTING METAL POTS, 6w.

APPLICATION IILBD JULY 19,1909.

Patented Oct. 12, 1909.

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MOLD FOR CASTING METAL POTS, 6w

APPLICATION FILED JULY 19,1909,

936,939. Patented Oct. 12 1 9.

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J. POWER.

MOLD FOR OASTIN G METAL-POTS, 6w.

APPLICATION IILED JULY 19,1909.

936,939. Patented Oct. 12,1909.

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APPLICATION FILED JULY 19, 1909.

Patented Oct. 12, 1909.

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MOLD FOR CASTING METAL POTS, 8m.

Specification of Letters Patent.

Patented Oct. 12, 1909.

Application filed July 19, 1909. Serial No. 508,500.

To all whom it may concern: 7

Be it known that I, JOHN Power, a citizen of the United States, residingat Pueblo, in the county of Pueblo and State of Colorado, have inventedcertain new and useful Improvements in Molds for Casting Metal Pots,&c., of which the following is a specification.

This invention relates to apparatus for casting metal pots and ingotmolds, and more particularly to improvements in collapsible core arborsfor casting molds which may-be readily removed from the casting.

One of the objects of my invention is to provide a collapsible corearbor which may be readily secured in posit-ion within the casting flaskand maintained rigidly during the casting operation, with means forquickly contracting and loosening it from the cast article so that thearbor may be entirely re moved, permitting the casting to shrink freelyas it cools.

Another object of my invention is to provide a core arbor which may bereadily loamed, together with means for loaming and sweeping the same.

Other objects of my invention will be apparent from the followingdescription, while the scope of my invention will be defined in theappended claims.

In order that my invention may be better understood, reference is madeto the accompanying drawings, in which Figure 1 is a vertical section ofone form of my collapsible core-arbor, shown in position in a flask forcasting large closed bot tom metal pots, after the metal has beenpoured; Fig. 2 is a top plan view of the same; Fig. 3 is a verticalsection of the core shown in Fig. 1, illustrating the manner of loamingand sweeping the same preparatory to the casting operation; Figs. 4 and5 are vertical sections of the top and bottom portions of the flaskshown in Fig. 1, illustrating the manner of loaming and sweeping thesame; Fig. 6 is avertical section of a modified form of my collapsiblecore arbor in which the arbor is integral and is spread into theposition for casting by means of a metal Wedge extendin the entirelength of the arbor, the flask being bolted in position in the castingit and the metal having been poured; Fig. is a top plan view of the corewith the wedge removed; Fig. 8 is a detailed view of the wedge; Fig. 9is a plan view of the ring-plate which is bolted to the bottom of thecore when in casting position; Fig. 10 is a vertical section on the linemw of Fig. 9. Fig. 11 is a vertical section of another form of mycasting mold, showing the collapsible core arbor made up of a pluralityof sections secured to a ring at the top and held at the bottom incasting posi tion by a tapered plug, this type being arranged forcasting pots or shells having an open bottom; Fig. 12 is a partial topview of Fig. 11; Figs. 13 and 1a are a vertical section and top planview, respectively, of the tapered plug; Fig. 15 is a vertical sec tionof a flask and collapsible core adapted for casting ingot molds; Fig. 16is a perspective view of one of the sections of the collapsible core;Fig, 17 is a top plan view of the base of the core; and Fig. 18 is a topplan view of the we'dging block for spreading the upper ends of thecollapsible core members. v

The casting of large articles or vessels presents great difficultiesowing to the large amount of shrinkage of the molten metal uponsolidifying, which renders the use of a solid arbor or core impossible.It has, therefore, been the general practice in casting large vessels orpots, to build up a core of brick to support the loam for the mold andafter the casting was poured the core was broken and dug out. Thismethod was slow and laborious and required the building of a new corefor each casting.

My present invention provides a means of casting large vessels rapidly,the same core being used repeatedly, and moreover, by its use insuring amore perfect casting since the core arbor may be removed as soon as themolten metal has solidified, thereby allowing the casting to shrinkfreely. I have also made especial provision for quickly and accuratelycovering the core with loam and sweeping into proper shape with a smoothuniform surface. I provide a metal core which may be rigidly securedafter assembling and accurately adjusted in the molding flask and whichmay be collapsed and readily removed from the'casting as soon as themolten metal has solidified.

It is oldin the art of casting cylindrical pipes to employ a collapsiblecore-barrel, but in so far as I am aware, there has never been devised,prior to my invention, any means by which the cores of molds for easting large vessels, ladles, 01' pots, could be made collapsible andremovable from the casting.

In Figs. 1 and 2, I have shown one type of rigging for castingcinder-pots constructed in accordance with my invention. The flaskcomprises the upper inverted frusto-conical portion 1 and the baseportion 2. The core or arbor comprises a plurality of tapering sections3, 8, the alternate sections 3 being provided with longitudinal flanges4 which overlap the contiguous edges of the intermediate sections 3. Atthe lower end of each section an integral rib 6 terminates in a conicalsector 7 forming, when assembled, a conical opening to receive atapering plug 10, carried by the stem or bar 11, by which it may beforced into position and rigidly secured by means of bolts 13 passingthrough the annular flange 14 projecting from the plug. Thecore-sections are bolted at the top to a ring 16, which is bolted to atrunnion beam 18. After the parts of the core have been assembled andrigidly secured together in the manner described, the core may be swungby means of a crane and inverted into the position shown in Fig. 3, withthe trunnions 20 resting upon suitable blocks 21. In this position asweep-frame 23 is placed over the core, with its pivot-bar 24 insertedin the central opening 27 in the plug 10. The loam 28 may now be quicklyand evenly swept or spread upon the core by revolving the sweep 23 aboutits pivot.

The flash is prepared in the same manner, the upper portion being placedover a plate 30, as shown in Fig. 4, which is provided with a centralopening or socket for the pivot pin of the sweep, and similarly thebottom portion of the flask is loamed and swept into shape asillustrated in Fig. 5. After the several parts of the mold have thusbeen prepared, the parts are assembled as shown in Fig. l, and thecasting is poured through the casting holes 32. When the molten metalhas solidified, the bolts 13 are removed and the plug is released, beingwithdrawn by turning the nut 33 on the .rod 11, until the flange 14engages the heads of the bolts 34. The several sections 3, 8, can thenbe loosened by means of a crane and the core be lifted out of, the mold,permitting the casting to cool and shrink freely.

In Fig. 6 I have shown a form of my invention which is adapted forcasting similar pots. The main portion of the core 40 is formed integraland divided longitudinally by a wedge-shaped slot into which the wedge41, shown in detail in Fig. 8, is forced and secured by means of keys4'2 driven between the flanges 43 and clamps 44. The lower portion ofthe core is composed of a plurality of radial wings or blades 46,connected to a central tubular stem 47, and

united at the top bya ring or annulus 48 by which it is bolted to theflange 4-9 of the upper or main portion. The upper and lower coreportions are separately loamed and swept in the manner previouslydescribed by inserting 'and attaching a rotary sweepframe. For thispurpose a plate having a socket for the pivot is temporarily bolted tothe flange 49 of the upper core part. After the core and flash have beenloamed, the core is lowered into position within the flask by means of acrane, the whole resting upon a casting stool 50 in a casting pit andsecurely held in position during the pouring operation by I-beams 52across the top. which are bolted to anchor rods projecting from theconcrete foundation. After the wasting has been poured and a suflicientamount of time elapsed for the metal to set, the wedge is released andpulled back slightly, being supported upon the bolt 55, passing throughthe flanges 43, thereby permitting the core arbor 40 to spring inward,by which it is freed from the casting and can then be lifted from themold by means of a c 'ane.

Another modification of my invention is shown in Fig. 11, and is adaptedfor casting large open bottom cinder pots, or shells. The core arbor isconstructed of a plurality of sections 60, having longitudinaloverlapping joints 61, fastened at the top to a ring 64, carried by atrunnion beam 65, and suitably formed at their lower ends to form atapering central opening into which the annular plug 66 is forced andrigidly fastened by means of bolts 67. Each of the core sections isprovided with a tapering finger 68,

which overhangs a corresponding tapering lug 69 on the interior of theannular plug. Now when the casting has been poured and the molten metalhas solidified, the nuts and sleeves 70 surrounding the bolts 67 areremoved and the annular plug 66 is raised slightly by screwing the nut72 on the rod 73, against the flange on the trunnion beam. This causeseach of the tapering lugs 69 to press inwardly upon the correspondingtapering finger 68, whereby the core-sections are moved radially inwardat the bottom and releasing the core from the casting and permitting itto be lifted from the mold in the manner previously described.

In Fig. 15, I have shown a collapsible core arbor applied to a mold forcasting ingot molds. The core arbor comprises a plurality of sections75, which fit in grooves 76 in a plate 78, at their lower ends, and areforced outwardly into proper position at the top by means of a taperingplug 79, provided with outwardly spreading fingers 80, which slide intapering recesses 81 in each of the sections. After the plug has beendrawn into proper position to hold the core sections in place, it isrigidly locked or keyed until the casting has been poured.

After the metal has solidified, the locking key is driven out and a pairof specially formed tongs such as shown are placed with their hooks 83,under the top flange S4 of the flask, and their extension arms 85resting upon the plug. Now by hoisting the tongs by means of a crane,the plug will first be driven downwardly, thereby forcing the coresections inwardly and releasing them from the casting, after which acontinued upward movement will lift the flask S6 and casting 87 abovethe core, which will be left standing upon the castin stool 88.

Each of the forms of my invention above described possesses theadvantages of a solid core during the operations of loaming and castingand at the same time the further advantage of being immediatelycollapsed and withdrawn from the casing as soon as it has solidified.These features of my casting mold will be appreciated by those skilledin this art, to whom it will be apparent that changes may be made in theconstructions herein disclosed without departing from the spirit of myinvention.

Having now described my invention, I claim and desire to secure byLetters Patent:

1. A mold for casting metal receptacles, comprising a flask, acollapsible metal core arbor divided longitudinally, a plate adapted toengage and support the core at one end, a wedge arranged to expand thearbor, and detachable means for rigidly securing the arbor in expandedposition.

2. A collapsible core arbor for casting molds, comprising alongitudinally divided metal shell or core, means to support the upperend, an annular flange at the lower end, a ring or annulus having radialribs or blades arranged to be secured to said flange, and a wedge memberto expand said core.

-3. A collapsible core arbor for casting molds, comprising a coredivided longitudinally and having upper and lower annular flanges, acarrying ring secured to said upper flange, an annulus arranged to besecured to said lower flange, and a wedge to expand said core.

4. A collapsible core arbor for casting molds, comprising a plurality ofcore sections provided with segmental flanges at their upper ends andwith tapering or beveled flanges at their lower ends, a carryin ringsecured to said upper flanges, a conica wedge to engage the lowerflanges and ex pand the core sections, and means for retracting thewedges and contracting the core.

5. A collapsible core arbor for casting molds, comprising interfittingcore-sections provided with outwardly directed upper flanges andinwardly directed tapering lower flanges, a carrying ring secured tosaid upper flanges, a conical wedge to engage the lower flanges andexpand the core sections, contacting devices upon each core sectionprojecting above said wedge, and means for retracting the wedge andcausing it to engage said contactin devices and move the core sectionsinwardly.

6. A collapsible core arbor for casting molds, comprising interfittingcore-sections provided with outwardly directed upper flanges andinwardly directed tapering lower flanges, a carrying ring secured tosaid upper flanges, an annular wedge to engage the lower flanges andexpand the core sections, beveled surfaces upon the interior of saidannular wedge, inwardly directed lugs or fingers upon said core sectionsadapted to engage said beveled surfaces, and means for raising saidwedge from engagement with said lower flanges and into engagement withsaid fingers, causing said core-sections to move inwardly.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN POWER.

Witnesses H. A. DEUEL, J AS. H. ROBINSON.

